New Caledonian lineages of Psychotria (Rubiaceae) reveal different evolutionary histories and the largest documented plant radiation for the archipelago

- Four lineages of Psychotria s.l. colonized New Caledonia during the Neogene.
- Their uneven diversifications are due to different adaptation abilities.
- The largest and most rapid New Caledonian plant diversification is highlighted.
- It has lead to 78 extant species.